| 张婷婷，崔乐怡，龙昌莲，张 航，张 琪，苟 秋，陈建华，刘 鹏.逆境条件下镉对臭牡丹幼苗生理变化的影响[J].广东农业科学,2018,45(4):94-99 |
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逆境条件下镉对臭牡丹幼苗生理变化的影响 |
| Effect of cadmium on the physiological changes of Clerodendrum bungei Steud. |
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| DOI：10.16768/j.issn.1004-874X.2018.04.014 |
| 中文关键词: 臭牡丹 镉 渗透调节 丙二醛 抗性 |
| 英文关键词: Clerodendrum bungei Steud cadmium osmotic adjustment malondialdehyde resistance |
| 基金项目:国家自然科学基金（ 41571049, 41461010）；浙江省公益技术应用研究计划项目（2015C32127） |
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| 中文摘要: |
| 为探究镉胁迫对臭牡丹幼苗生理变化的影响，进行土培试验，设0、0.1、0.3、0.6、0.9 mmol/L 5
种镉胁迫浓度处理，测定其对臭牡丹叶片叶绿素荧光参数、丙二醛、脯氨酸、可溶性糖、可溶性蛋白含量的
影响。结果表明：随着镉处理浓度升高，叶片PS Ⅱ潜在活性（Fv/Fo）和光化学淬灭系数（qP）逐渐减小，
最高抑制率分别为43.10% 和37.82%，而非光化学淬灭系数（qN）逐渐增加，最大增幅达48.13%；低浓度
镉胁迫使臭牡丹幼苗可溶性糖和可溶性蛋白含量分别提高39.01% 和73.07%，而高浓度镉则对植株可溶性
糖和可溶性蛋白含量产生抑制作用。叶片MDA、脯氨酸含量随镉浓度的增加而上升，其中丙二醛含量在胁
迫前期增长平缓，后期增长趋势显著，最高增长率达45.29%。可见臭牡丹对镉胁迫具有一定的适应性，可
以通过调节自身光合特性和累积渗透调节物质缓解胁迫伤害。 |
| 英文摘要: |
| In order to determine the effect of cadmium on the physiological changes of Clerodendrum bungei
seedlings，field experiment was conducted with 5 Cd concentrations as 0，0.1，0.3，0.6，0.9 mmol/L. Based on
chlorophyll fluorescence parameters，malondialdehyde（MDA） content，proline content，soluble sugar content
and soluble protein content measarements. The results showed that potential photochemical efficiency（Fv/Fo） and
chemical quenching coefficient（qP） declined with Cd2+ concentration increased，the highest rate of inhibition was
43.10% and 37.82%，while non-photochemical quenching coefficient（ qN） gradually increased by 48.13%. Low
concentration Cd2+ had promotion effect on the contents of soluble sugar and soluble protein，but high concentration
of Cd2+ had an significant inhibitory effect. With the Cd2+ stress concentration increased，the contents of MDA and
proline in leaves of Clerodendrum bungei increased by 39.01%，73.07%. MDA content changed significantly at
high concentration，which increased up to 45.29%. There results suggested that the plant might somewhat adapt to
cadmium stress，by adjusting its own the photosynthetic characteristics and osmatic adjustment substance. |
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